Biofilm development in fixed bed biofilm reactors: experiments and simple models for engineering design purposes

Szilágyi, Nikolett; Kovács, Róbert; Kenyeres, István; Csikor, Zs.

doi:10.2166/wst.2013.385

Cited by 4 publications

(2 citation statements)

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“…Where m(t) is the attached biofilm as a function of time, m max the maximum amount of 10 biofilm and K m coefficient of growth. The curve was fitted by manipulating the K m in order to 11 obtain the best fitted curve (Szilágyi et al, 2013) regression between the cumulative production of volatile suspended solids (VSS) in the 5 effluent and the cumulative COD removed (tCOD in -sCOD out ). 6…”

Section: Introductionmentioning

confidence: 99%

Influence of carrier media physical properties on start-up of moving attached growth systems

Dias

Bellingham²,

Hassan³

et al. 2018

Bioresource Technology

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7Five carrier media with different shapes (spherical and cylindrical), sizes, voidage and 8 protected surface areas (112-610 m 2 /m 3 ) were studied in a pilot scale moving bed 9 biofilm reactor (MBBR). This study aimed at assessing start-up duration using biofilm 10 formation rates. Results indicated that the spherical media required shorter periods to 11 achieve stable biofilm formation rates associated with chemical oxygen demand (COD) 12(15-17 days), compared to cylindrical high surface area media (23-24 days). Protected 13 surface area presented weaker correlations with the biofilm formation rate for COD 14 (R 2 = 0.83) and ammonia removal (R 2 = 0.76). However, good correlations were 15 observed with a combination of the media physical factors: dimensionality (Di), 16 voidage (Voi), and hydraulic efficiency (HE) strongly correlated with biofilm formation 17 rates for heterotrophic (R 2 = 0.95) and nitrifying bacteria (R 2 = 0.92). This study 18proposes that the media physical properties can contribute to shortening start-up, 19contributing to improved removal rates and fast commissioning of MBBRs. 20 21

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Section: Introductionmentioning

confidence: 99%

Influence of carrier media physical properties on start-up of moving attached growth systems

Dias

Bellingham²,

Hassan³

et al. 2018

Bioresource Technology

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“…For other compounds, the removal of PPCPs across the secondary treatment process was significantly correlated with the biodegradation predicted by BIOWIN4. Barat et al (2013) Biofilm development in a fixed bed biofilm reactor system performing municipal wastewater treatment was monitored by Szilágyi et al (2013) aiming at accumulating colonization and maximum biofilm mass data usable in engineering practice for process design purposes.…”

Section: Modelingmentioning

confidence: 99%

Modeling, Instrumentation, Automation, and Optimization of Water Resource Recovery Facilities

Sweeney¹,

Kabouris²

2014

Water Environment Research

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A review of the literature published in 2013 on topics relating to water resource recovery facilities (WRRF) in the areas of modeling, instrumentation, automation and optimization of wastewater treatment is presented. Note that WEF has adopted the term ‘WRRF’ replacing such previous terms as publicly owned treatment works, wastewater treatment plant, and other conventional terms and officially instituted this change in its publications beginning in 2012. It is anticipated the replaced terms will remain in use by other publications and authors for some time.

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Large-scale biofilm cultivation of Antarctic bacterium Pseudoalteromonas haloplanktis TAC125 for physiologic studies and drug discovery

Parrilli¹,

Ricciardelli²,

Casillo³

et al. 2016

Extremophiles

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Microbial biofilms are mainly studied due to detrimental effects on human health but they are also well established in industrial biotechnology for the production of chemicals. Moreover, biofilm can be considered as a source of novel drugs since the conditions prevailing within biofilm can allow the production of specific metabolites. Antarctic bacterium Pseudoalteromonas haloplanktis TAC125 when grown in biofilm condition produces an anti-biofilm molecule able to inhibit the biofilm of the opportunistic pathogen Staphylococcus epidermidis. In this paper we set up a P. haloplanktis TAC125 biofilm cultivation methodology in automatic bioreactor. The biofilm cultivation was designated to obtain two goals: (1) the scale up of cell-free supernatant production in an amount necessary for the anti-biofilm molecule/s purification; (2) the recovery of P. haloplanktis TAC125 cells grown in biofilm for physiological studies. We set up a fluidized-bed reactor fermentation in which floating polystyrene supports were homogeneously mixed, exposing an optimal air-liquid interface to let bacterium biofilm formation. The proposed methodology allowed a large-scale production of anti-biofilm molecule and paved the way to study differences between P. haloplanktis TAC125 cells grown in biofilm and in planktonic conditions. In particular, the modifications occurring in the lipopolysaccharide of cells grown in biofilm were investigated.

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Biofilm development in fixed bed biofilm reactors: experiments and simple models for engineering design purposes

Cited by 4 publications

References 0 publications

Influence of carrier media physical properties on start-up of moving attached growth systems

Influence of carrier media physical properties on start-up of moving attached growth systems

Modeling, Instrumentation, Automation, and Optimization of Water Resource Recovery Facilities

Large-scale biofilm cultivation of Antarctic bacterium Pseudoalteromonas haloplanktis TAC125 for physiologic studies and drug discovery

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